How convert LPTSTR to char ch[]

I need to convert an LPTSTR p to CHAR ch[]. I am new to C++.

#include "stdafx.h"
 #define _WIN32_IE 0x500
 #include <shlobj.h>
 #include <atlstr.h>
 #include <iostream>
 #include <Strsafe.h>
 
 using namespace std;
 
 int main(){
     int a;
     string res;
     CString path;
     char ch[MAX_PATH];
     LPTSTR p = path.GetBuffer(MAX_PATH);
     HRESULT hr = SHGetFolderPath(NULL,CSIDL_APPDATA, NULL, SHGFP_TYPE_CURRENT, p);
 
 /* some operation with P and CH */
 
     if(SUCCEEDED(hr))
     { /* succeeded */
         cout << ch;
     } /* succeeded */
     else
     { /* failed */
         cout << "error";
     } /* failed */
     cin >> a;
     return 0;
 }
 

Thanks in advance.

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